かぜ っちゃう
kaze tacchau

Godan Verb (tsu)
Godan Verb (u)

The completive aspect (contracted form) - indicates completion or regret of 風立つ

1. The wind will pick up.; (It) got windy.; ; (Regret/completion nuance: something is ruined/spoiled because the wind picked up)

Completed Action
Colloquial